<script setup lang="ts">
import { reactive,ref } from 'vue'

import { onLoad } from '@dcloudio/uni-app'

import { getHomeRecommend,SubTypeItem} from "@/api/home";

interface metaType {
  title: string
  coverPath: string
  tabs: string[]
}

const metaMap = reactive<{ [key: string]: metaType }>({
  1: {
    title: '特惠推荐',
    coverPath:
      'https://pcapi-xiaotuxian-front-devtest.itheima.net/miniapp/uploads/recommend_1.jpg',
    tabs: ['价格', '折扣', '筛选'],
  },
  2: {
    title: '爆款推荐',
    coverPath:
      'https://pcapi-xiaotuxian-front-devtest.itheima.net/miniapp/uploads/recommend_2.jpg',
    tabs: ['24小时热搜', '热销总榜', '人气周榜'],
  },
  3: {
    title: '一站买全',
    coverPath:
      'https://pcapi-xiaotuxian-front-devtest.itheima.net/miniapp/uploads/recommend_3.jpg',
    tabs: ['搞定熊孩子', '家里不凌乱', '让音质更出众'],
  },
  5: {
    title: '新鲜好物',
    coverPath:
      'https://pcapi-xiaotuxian-front-devtest.itheima.net/miniapp/uploads/recommend_4.jpg',
    tabs: ['抢先尝新', '新品预告'],
  },
})

let type = $ref('1')
let meta = $ref(metaMap[type])
const bannerPicture=ref('')
const subTypes=ref<SubTypeItem[]>([])
// type 和 url 的映射关系
const urlMap = [
  { type: '1', title: '特惠推荐', url: '/hot/preference' },
  { type: '2', title: '爆款推荐', url: '/hot/inVogue' },
  { type: '3', title: '一站买全', url: '/hot/oneStop' },
  { type: '4', title: '领券中心', url: '/hot/new' }, // 后端未提供，暂用新鲜好物url
  { type: '5', title: '新鲜好物', url: '/hot/new' },
]

let currUrl=''
onLoad(async ({ type }) => {
  // if (type) meta = metaMap[type]
  // console.log(type);
  // if (type === "1") {
  //   // 特惠推荐
  //   const res = await getHotPreference({});
  //    // 更换导航栏标题
  //   uni.setNavigationBarTitle({
  //     title: res.title,
  //   });
  //   // 更换背景图片
  //   bannerPicture.value = res.bannerPicture;
  //   subTypes.value=res.subTypes
  // } else if (type === "2") {
  //   // 爆款推荐
  //   const res = await getHotInVogue({});
    // // 更换导航栏标题
    // uni.setNavigationBarTitle({
    //   title: res.title,
    // });
    // // 更换背景图片
    // bannerPicture.value = res.bannerPicture;
    // subTypes.value=res.subTypes
  // }
  const currUrlMap=urlMap.find((item)=>item.type===type)
  if(currUrlMap){
   currUrl=currUrlMap.url
   const res=await getHomeRecommend(currUrlMap.url,{})
    // 更换导航栏标题
    uni.setNavigationBarTitle({
      title: res.title,
    });
    // 更换背景图片
    bannerPicture.value = res.bannerPicture;
    subTypes.value=res.subTypes
  }
});

// 动态更新导航栏标题
uni.setNavigationBarTitle({
  title: meta.title,
})
// 当前tab的下标
const activeIndex=ref(0)
// 点击切换tab
const changeTab=(index:number)=>{
  activeIndex.value=index
}
// 触底,加载下一页数据
const onScrolltolower=async()=>{
  // 先找到当前的商品列表是哪一个
  const currSubType=subTypes.value[activeIndex.value]
  // 如果当前页是最后一页,则停止加载
  if(currSubType.goodsItems.page===currSubType.goodsItems.pages) return
  // 当前页加1
  currSubType.goodsItems.page += 1
  // 请求下一页数据
  const res=await getHomeRecommend(currUrl,{
    page:Number(currSubType.goodsItems.page),
    pageSize:10,
    subType:currSubType.id
  })
  // 将请求到的下一页数据和原来的数据组合在一起
  currSubType.goodsItems.items.push(...res.subTypes[activeIndex.value].goodsItems.items)
}
</script>

<template>
  <view class="viewport">
    <!-- 推荐封面图 -->
    <view class="cover">
      <image :src="bannerPicture"></image>
    </view>
    <view class="tabs">
      <text
        class="text"
        v-for="(item, index) in subTypes"
        :key="item.id"
        :class="{ active: index === activeIndex }"
        @tap="changeTab(index)"
        >{{ item .title}}</text
      >
    </view>
    <scroll-view v-for="(item,index) in subTypes" :key="item.id" v-show="index===activeIndex" scroll-y enhanced :show-scrollbar="false" class="scroll-view" @scrolltolower="onScrolltolower">
      <view class="goods">
        <navigator
        v-for="goods in item.goodsItems.items"
        :key="goods.id"
          hover-class="none"
          :url="`/pages/goods/index?id=${goods.id}`"
          class="navigator"
        >
          <image
            class="thumb"
            :src="goods.picture"
          ></image>
          <view class="name ellipsis">{{ goods.name }}</view>
          <view class="price">
            <text class="symbol">¥</text>
            <text class="number">{{ goods.price }}</text>
            <text class="decimal">.00</text>
          </view>
        </navigator>
      </view>
      <view class="loading">{{ subTypes[activeIndex].goodsItems.page===subTypes[activeIndex].goodsItems.pages?'没有更多数据了~':'正在加载...' }}</view>
    </scroll-view>
  </view>
</template>

<style>
page {
  height: 100%;
  background-color: #f4f4f4;
}

.viewport {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 180rpx 0 0;
  position: relative;
}

.cover {
  width: 750rpx;
  height: 225rpx;
  border-radius: 0 0 40rpx 40rpx;
  overflow: hidden;

  position: absolute;
  left: 0;
  top: 0;
}

.tabs {
  display: flex;
  justify-content: space-evenly;
  height: 100rpx;
  line-height: 90rpx;
  margin: 0 20rpx;
  font-size: 28rpx;
  border-radius: 10rpx;
  box-shadow: 0 4rpx 5rpx rgba(200, 200, 200, 0.3);
  color: #333;
  background-color: #fff;
  position: relative;
  z-index: 9;
}

.tabs .text {
  margin: 0 20rpx;
  position: relative;
}

.tabs .active::after {
  content: '';
  width: 40rpx;
  height: 4rpx;
  transform: translate(-50%);
  background-color: #27ba9b;
  position: absolute;
  left: 50%;
  bottom: 24rpx;
}

.scroll-view {
  flex: 1;
}

.goods {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  padding: 0 20rpx 20rpx;
}

.goods .navigator {
  width: 345rpx;
  padding: 20rpx;
  margin-top: 20rpx;
  border-radius: 10rpx;
  background-color: #fff;
}

.goods .thumb {
  width: 305rpx;
  height: 305rpx;
}

.goods .name {
  height: 88rpx;
  font-size: 26rpx;
}

.goods .price {
  line-height: 1;
  color: #cf4444;
  font-size: 30rpx;
}

.goods .symbol,
.goods .decimal {
  font-size: 70%;
}
</style>
